Some substances look alike and the density can help you determine which is which. It also helps to tell which is heavier than the other.
Answer:

Explanation:
Pressure at the bottom of the building and at the top of the building must be related as



now we will have




now we have


Answer:
Because when people under the age of 21 try to buy alcohol, they need to be verified by their state that they are that age. So if they are under legal age, 21, the store isn't allowed to give them the Alcoholic beverage.
Explanation:
Well she drove 30 more miles to the east than the west but I don’t understand what u are asking
Answer:
I think it is heterogeneous mixture. have a good day